null@ipaddress playlists

Hi,
I have deployed subsonic a week back and I have not given url to anybody, but I constantly see null@ipaddress playlists from the ip addresses I don't recognize.
Is there any security setting I need to take care?
Thanks,
Vivek.
I have deployed subsonic a week back and I have not given url to anybody, but I constantly see null@ipaddress playlists from the ip addresses I don't recognize.
Is there any security setting I need to take care?
Thanks,
Vivek.